The 3 kinds of motors currently in the Cyborg parts bucket. Some specs on these are in the [http://spreadsheets.google.com/ccc?key=p--xq5BkJD5E_DTRwEdLcEA&hl=en vibromotor spreadsheet]

The 3 kinds of motors currently in the Cyborg parts bucket. Some specs on these are in the [http://spreadsheets.google.com/ccc?key=p--xq5BkJD5E_DTRwEdLcEA&hl=en vibromotor spreadsheet]

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==== Spreadsheet explanation ====

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The first number in the 'at this V' column is the lowest voltage we were able to get the thing to go on at all. We usually had to help it get started.

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The next column, 'draw at (mA),' is the draw at that voltage, according to the really lovely fancy power supply upstairs with the digital outputs.

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The ohm values are just division according to Ohm's Law, '''V / I = R''' .

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The thinking behind 'starts from Most Stuck' is that the point at which it stops on its own is the stickiest point, and it would be good to know how much voltage it takes to overcome that. The process we used is this:

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# get the motor running

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# drop the voltage until it stops

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# raise the voltage until it starts on its own

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# repeat once or twice

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It is likely to vary on a motor-to-motor basis but this is at least a starting point. Likely PWM is going to be a more consistent and cleaner way to vary the feel of the vibration. I'd like to come up with some PWM specs, not sure yet what those would be exactly.

Vibration (pager motor)

The 3 kinds of motors currently in the Cyborg parts bucket. Some specs on these are in the vibromotor spreadsheet

Spreadsheet explanation

The first number in the 'at this V' column is the lowest voltage we were able to get the thing to go on at all. We usually had to help it get started.
The next column, 'draw at (mA),' is the draw at that voltage, according to the really lovely fancy power supply upstairs with the digital outputs.
The ohm values are just division according to Ohm's Law, V / I = R .
The thinking behind 'starts from Most Stuck' is that the point at which it stops on its own is the stickiest point, and it would be good to know how much voltage it takes to overcome that. The process we used is this:

get the motor running

drop the voltage until it stops

raise the voltage until it starts on its own

repeat once or twice

It is likely to vary on a motor-to-motor basis but this is at least a starting point. Likely PWM is going to be a more consistent and cleaner way to vary the feel of the vibration. I'd like to come up with some PWM specs, not sure yet what those would be exactly.